Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Gammaproteobacteria" Garrity et al., 2005 [monotypic]
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Thiotrichales Garrity et al. 2005
                     Family Thiotrichaceaeᵀ Garrity et al. 2005
                       Genus Thiothrixᵀ Winogradsky 1888 (Approved Lists 1980)
                         1 Thiothrix defluvii Howarth et al. 1999
                         2 Thiothrix disciformis Aruga et al. 2002
                         3 Thiothrix eikelboomii Howarth et al. 1999
                         4 Thiothrix flexilis Aruga et al. 2002
                         5 Thiothrix fructosivorans Howarth et al. 1999
                         6 Thiothrix niveaᵀ (Rabenhorst 1865) Winogradsky 1888 (Approved Lists 1980)
                         7 Thiothrix unzii Howarth et al. 1999